[INFO] crate threader 0.0.4 is already in cache
[INFO] checking threader-0.0.4 against master#8ac1525e091d3db28e67adcbbd6db1e1deaa37fb for pr-73323
[INFO] extracting crate threader 0.0.4 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate threader 0.0.4 on toolchain 8ac1525e091d3db28e67adcbbd6db1e1deaa37fb
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8ac1525e091d3db28e67adcbbd6db1e1deaa37fb" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate threader 0.0.4
[INFO] finished tweaking crates.io crate threader 0.0.4
[INFO] tweaked toml for crates.io crate threader 0.0.4 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8ac1525e091d3db28e67adcbbd6db1e1deaa37fb" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8ac1525e091d3db28e67adcbbd6db1e1deaa37fb" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+8ac1525e091d3db28e67adcbbd6db1e1deaa37fb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8c67a1b1944a70404c86509bf6fae3eb097cc6097beddf421fc6175c562e1937
[INFO] running `Command { std: "docker" "start" "-a" "8c67a1b1944a70404c86509bf6fae3eb097cc6097beddf421fc6175c562e1937", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c67a1b1944a70404c86509bf6fae3eb097cc6097beddf421fc6175c562e1937", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c67a1b1944a70404c86509bf6fae3eb097cc6097beddf421fc6175c562e1937", kill_on_drop: false }`
[INFO] [stdout] 8c67a1b1944a70404c86509bf6fae3eb097cc6097beddf421fc6175c562e1937
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+8ac1525e091d3db28e67adcbbd6db1e1deaa37fb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] be0bb2ae4d56f895c38d0da2e34a7b17cf1d8ec61b3b39a322bad4dc19fc3e3c
[INFO] running `Command { std: "docker" "start" "-a" "be0bb2ae4d56f895c38d0da2e34a7b17cf1d8ec61b3b39a322bad4dc19fc3e3c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.72
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking once_cell v1.4.0
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]     Checking serde_json v1.0.56
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking crossbeam-channel v0.4.2
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking net2 v0.2.34
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking thread-id v3.3.0
[INFO] [stderr]     Checking flame v0.2.2
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking crossbeam v0.7.3
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking threader v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ptr`
[INFO] [stdout]  --> src/thread_pool/task/raw.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     ptr,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `InvalidGuard`
[INFO] [stdout]  --> src/thread_pool/task/mod.rs:6:19
[INFO] [stdout]   |
[INFO] [stdout] 6 | use raw::{Header, InvalidGuard, RawTask};
[INFO] [stdout]   |                   ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ptr`
[INFO] [stdout]  --> src/thread_pool/task/raw.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     ptr,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `InvalidGuard`
[INFO] [stdout]  --> src/thread_pool/task/mod.rs:6:19
[INFO] [stdout]   |
[INFO] [stdout] 6 | use raw::{Header, InvalidGuard, RawTask};
[INFO] [stdout]   |                   ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/thread_pool/mod.rs:252:21
[INFO] [stdout]     |
[INFO] [stdout] 252 |             fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
[INFO] [stdout]     |                     ----^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `try_clone`
[INFO] [stdout]    --> src/net/tcp.rs:102:8
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn try_clone(&self) -> io::Result<TcpStream> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `count`
[INFO] [stdout]   --> src/thread_pool/mod.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     count: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `try_clone`
[INFO] [stdout]    --> src/net/tcp.rs:102:8
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn try_clone(&self) -> io::Result<TcpStream> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `count`
[INFO] [stdout]   --> src/thread_pool/mod.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     count: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.37s
[INFO] running `Command { std: "docker" "inspect" "be0bb2ae4d56f895c38d0da2e34a7b17cf1d8ec61b3b39a322bad4dc19fc3e3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be0bb2ae4d56f895c38d0da2e34a7b17cf1d8ec61b3b39a322bad4dc19fc3e3c", kill_on_drop: false }`
[INFO] [stdout] be0bb2ae4d56f895c38d0da2e34a7b17cf1d8ec61b3b39a322bad4dc19fc3e3c